VNT and EGR Technologies for a Turbocharged Diesel Engine

DOI

10.2991/ap3er-15.2015.4How to use a DOI?

Keywords

Variable nozzle turbine; Turbocharger; Emissions, EGR

Abstract

In this study an experimental investigation was carried out on a turbocharger with variable nozzle turbine (VNT) and exhaust gas recirculation (EGR) system reducing emissions of a direct injection diesel engine. In the EGR system, the exhaust gas was tapped off before the turbine, cooled, and mixed with the intake air after the compressor. A positive pressure difference across the EGR circuit was set up by using a VNT turbocharger, a venturi pipe positioned in the intake manifold such as to provide extra suction power to the EGR gases. The emissions behavior and efficiency with the EGR system were tested in a number of engine working points. The results indicated that the engine could achieve a perfect performance in all speed range with applying of the turbocharger with VNT. The torque was improved greatly at any speed, especially at low speeds; The fuel consumption was improved too; The nitric oxides (NOX) emissions was reduced by large scale by EGR system. With using VNT and venturi pipe, the EGR area and the maximum EGR rate could be enlarged, the NOX emissions was reduced to lower level.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Junhua Wu
AU  - Fushan Zuo
AU  - Yonghui Zhang
PY  - 2015/06
DA  - 2015/06
TI  - VNT and EGR Technologies for a Turbocharged Diesel Engine
BT  - Proceedings of the 2015 Asia-Pacific Energy Equipment Engineering Research Conference
PB  - Atlantis Press
SP  - 13
EP  - 18
SN  - 2352-5401
UR  - https://doi.org/10.2991/ap3er-15.2015.4
DO  - 10.2991/ap3er-15.2015.4
ID  - Wu2015/06
ER  -